He did with the freezing of foreign aid (which did affect Ukraine to some degree, though not military). Its a clear sign Trump doesn't want to play world policeman anymore, at least not where its the US strategic interest (China and some aspects of the ME nonwithstanding)
Trump may be more reasonable, at least in this respect, than alot are thinking
It may come down to which party Trump thinks is being less reasonable. If Putin (or Zelensky) overplay their hand, they are flirting with disaster. Right now it does appear at least to neutral observers, Ukraine is the more reasonable party, as they indicated they would be open to freezing the conflict mostly along current lines, in exchange for hard security guarantees
Most of what I'm hearing coming out of Russia is demanding Ukraine hand over unconquered territory, pull back from Kursk, and demilitarize with no security guarantees. Thats a non-starter